Exhaust port cones
 

What's the best way to remove exhaust port cones? I have never done this and I was told they can be swapped out. Any help would be appreciated.

There is a pin on either side of the housing. You remove each one and the cone falls out.

^Yep, two roll pins, if you have access to a welder and Welding pliers(locking channels, vise grips?) try this technique...

Preform a spot weld onto the roll pin. Don't worry, it will only fuse to the metal pin, and not the aluminum housing; use the pliers to grab hold of the weld, twist it counter-clockwise or clockwise, and pull out. You can re-use the roll pin if you grind off the weld.

But if your welder didn't work like mine after countless tries, or you can't find one, you have other options that I wouldn't reccommend at first. You can use a tap and die set to create threads for a screw to fit into the roll pin and then yank it out(very exhausting). Or if you have a drill, a dremel, or a die grinder, you can grind them out(very teadous). A local hardware store should be full of new ones.

These are if you plan to re-use the exhaust sleeve(cone?).

Now, if you plan to swap them out, you can use a screwdriver that can fit into the hole and a die grinder(or dremel) to just grind out the exhaust sleeve and push the pin out throught the new hole you created.

https://www.rx7club.com/showthread.p...sleeve+removal

https://www.rx7club.com/showthread.p...sleeve+removal

Hope I helped!

and now someone explain how you can remove them with the motor assembled ;)

That's the problem, you can't. The two pins are on each side of the rotor housing. You would have to disassemble the engine.:(

I will try it with the welder, I have a junk housing to experiment with. I have a few pairs of good Cosmo re housings that are sitting around I need to add them to my good stock.

One more question is the pin salvagable after this? Thank's guy's for the help.

yes it is.

It's just a standard cotter pin that you can buy at nearly any home improvement center.

Why do you want to remove them? What are you planning to swap them out with?

I have a couple of pairs of cosmo housings that I want to put 3rd gen cones in. Building a back up turbo motor and don't want to buy housings.

go baller status and remove them. Your engine wont last long but itll sure be fast :P